vtkTextRepresentation.h

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/*=========================================================================

  Program:   Visualization Toolkit
  Module:    vtkTextRepresentation.h

  Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
  All rights reserved.
  See Copyright.txt or http://www.kitware.com/Copyright.htm for details.

     This software is distributed WITHOUT ANY WARRANTY; without even
     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
     PURPOSE.  See the above copyright notice for more information.

=========================================================================*/
#ifndef vtkTextRepresentation_h
#define vtkTextRepresentation_h

#include "vtkInteractionWidgetsModule.h" // For export macro
#include "vtkBorderRepresentation.h"

class vtkRenderer;
class vtkTextActor;
class vtkTextProperty;
class vtkTextRepresentationObserver;

class VTKINTERACTIONWIDGETS_EXPORT vtkTextRepresentation : public vtkBorderRepresentation
{
public:
  static vtkTextRepresentation *New();


  vtkTypeMacro(vtkTextRepresentation,vtkBorderRepresentation);
  void PrintSelf(ostream& os, vtkIndent indent);


  void SetTextActor(vtkTextActor *textActor);
  vtkGetObjectMacro(TextActor,vtkTextActor);


  void SetText(const char* text);
  const char* GetText();

  virtual void BuildRepresentation();
  virtual void GetSize(double size[2])
    {size[0]=2.0; size[1]=2.0;}


  virtual void GetActors2D(vtkPropCollection*);
  virtual void ReleaseGraphicsResources(vtkWindow*);
  virtual int RenderOverlay(vtkViewport*);
  virtual int RenderOpaqueGeometry(vtkViewport*);
  virtual int RenderTranslucentPolygonalGeometry(vtkViewport*);
  virtual int HasTranslucentPolygonalGeometry();

  enum
  {
    AnyLocation = 0,
    LowerLeftCorner,
    LowerRightCorner,
    LowerCenter,
    UpperLeftCorner,
    UpperRightCorner,
    UpperCenter
  };


  virtual void SetWindowLocation(int enumLocation);
  vtkGetMacro(WindowLocation, int);


  virtual void SetPosition(double x, double y);
  virtual void SetPosition(double pos[2])
    { this->SetPosition(pos[0], pos[1]);};


  void ExecuteTextPropertyModifiedEvent(vtkObject* obj, unsigned long enumEvent, void* p);
  void ExecuteTextActorModifiedEvent(vtkObject* obj, unsigned long enumEvent, void* p);

protected:
  vtkTextRepresentation();
  ~vtkTextRepresentation();

  // Initialize text actor
  virtual void InitializeTextActor();

  // Check and adjust boundaries according to the size of the text
  virtual void CheckTextBoundary();

  // the text to manage
  vtkTextActor  *TextActor;
  vtkTextProperty *TextProperty;

  // Window location by enumeration
  int WindowLocation;
  virtual void UpdateWindowLocation();

  // observer to observe internal TextActor and TextProperty
  vtkTextRepresentationObserver *Observer;

private:
  vtkTextRepresentation(const vtkTextRepresentation&) VTK_DELETE_FUNCTION;
  void operator=(const vtkTextRepresentation&) VTK_DELETE_FUNCTION;
};

#endif